StarTech.com CB1S485 - Manual (Page 6)

Instruction Manual
3
Terminator Settings
DB9 Connector Pinout
Terminator Enable/
Disable Switches
Switch
Name
Jumper
Positions
Mode and
Termination
Resistor Setting
TXD
Up
(default)
2-wire RS-485
mode (Note)
Down
4-wire RS-422
mode
RXD
Up
Transmitting data
will be echoed
back
Down
(default)
No echo data
RTS
Up
(default)
RTS will be
connected to CTS
Down
RTS and CTS
operate normally
CTS
Up
CTS Terminator
Disabled
Down
(default)
CTS Terminator
Enabled
9 Pins Signal
1 TXD- (DATA-)
2 TXD+ (DATA+)
3 RXD+
4 RXD-
5 GND
6 RTS-
7 RTS+
8 CTS+
9 CTS-
1 5
9 6